In this DF, there is a straight-through path from the ID Card Feeder, so duplex scanning is possible without ID cards bending.
In the straight-through path, the white guide plate for the front [A] is built into the original rear side CIS unit, and the white guide plate for the rear side [B] is attached on the sheet-through glass on the scanner unit.
The white guide plates are in an easily accessible location, so keep them clean.